diff -r 7acbef680bef -r f5c0749858fd main_marking1/drumb_test7.scala
--- a/main_marking1/drumb_test7.scala	Sun Jan 15 10:58:13 2023 +0000
+++ b/main_marking1/drumb_test7.scala	Sat Mar 11 22:01:53 2023 +0000
@@ -1,16 +1,19 @@
+import scala.concurrent._
+import scala.concurrent.duration._
+import ExecutionContext.Implicits.global
+import scala.language.postfixOps 
 
+lazy val f = Future {
 
 assert(M1.investment(List("GOOG", "AAPL", "BIDU"), 2000 to 2000, 100) == 100)
 assert(M1.investment(List("GOOG", "AAPL", "BIDU"), 2000 to 2001, 100) == 27)
 assert(M1.investment(List("GOOG", "AAPL", "BIDU"), 2000 to 2002, 100) == 42)
 assert(M1.investment(List("GOOG", "AAPL", "BIDU"), 2000 to 2003, 100) == 27)
 assert(M1.investment(List("GOOG", "AAPL", "BIDU"), 2000 to 2004, 100) == 38)
+assert((112 to 114).contains(M1.investment(List("GOOG", "AAPL", "BIDU"), 2000 to 2005, 100)))  // 113
+assert((252 to 256).contains(M1.investment(List("GOOG", "AAPL", "BIDU"), 2000 to 2006, 100)))  // 254
+assert((346 to 352).contains(M1.investment(List("GOOG", "AAPL", "BIDU"), 2000 to 2007, 100)))  // 349
+assert((11389 to 11619).contains(M1.investment(List("GOOG", "AAPL", "BIDU"), 1990 to 2017, 100))) //11504
+}
 
-// 113
-assert((112 to 114).contains(M1.investment(List("GOOG", "AAPL", "BIDU"), 2000 to 2005, 100)))
-// 254
-assert((252 to 256).contains(M1.investment(List("GOOG", "AAPL", "BIDU"), 2000 to 2006, 100)))
-// 349
-assert((346 to 352).contains(M1.investment(List("GOOG", "AAPL", "BIDU"), 2000 to 2007, 100)))
-//11504
-assert((11389 to 11619).contains(M1.investment(List("GOOG", "AAPL", "BIDU"), 1990 to 2017, 100)))
+Await.result(f, 32 second)